skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Quasiparticle and spin excitations for two coupled Hubbard planes and comparison with experiments on bilayer YBa{sub 2}Cu{sub 3}O{sub 6+{ital x}}

Abstract

We use the fluctuation-exchange approximation on the real-frequency axis to calculate the quasiparticle self-energies and dynamic spin susceptibilities for the bonding and antibonding bands of two Hubbard planes coupled by interlayer hopping {ital t}{prime}. In the normal state we find that for increasing {ital t}{prime} ({approx_gt}0.3{ital t}) the interband spin susceptibility {chi}{sup {minus}} becomes much larger than the intraband susceptibility {chi}{sup +}. The {ital q{searrow}}, {omega}, and {ital T} dependence of Im{chi}{sup {minus}} agrees qualitatively with magnetic neutron scattering data on YBa{sub 2}Cu{sub 3}O{sub 6+{ital x}}. The ratio of the interlayer and intralayer spin-echo decay rates, {ital T}{sub 2}/{ital T}{sub 2}{sup {asterisk}}, becomes for {ital t}{prime}=0.3{ital t} roughly equal to the recent data of nuclear-quadrupole-resonance spin-echo double resonance. The splitting of the renormalized Fermi lines has about the same magnitude as the splitting observed by angle-resolved photoemission spectroscopy. The superconducting transition temperature for {ital d}{sub {ital x}{sup 2}{minus}{ital y}{sup 2}}-wave pairing decreases rapidly as {ital t}{prime} increases above {ital t}{prime}{approx_equal}0.3{ital t}. Our results for the reductions of intraplane magnetic correlations and pairing correlations by interlayer hopping are consistent with results of quantum Monte Carlo simulations. {copyright} {ital 1996 The American Physical Society.}

Authors:
; ;  [1]
  1. Abteilung fuer Theoretische Festkoerperphysik, Universitaet Hamburg, Jungiusstrasse 11, D-20355 Hamburg (Germany)
Publication Date:
OSTI Identifier:
383259
Resource Type:
Journal Article
Journal Name:
Physical Review, B: Condensed Matter
Additional Journal Information:
Journal Volume: 54; Journal Issue: 9; Other Information: PBD: Sep 1996
Country of Publication:
United States
Language:
English
Subject:
66 PHYSICS; HIGH-TC SUPERCONDUCTORS; QUASI PARTICLES; YTTRIUM OXIDES; BARIUM OXIDES; COPPER OXIDES; SELF-ENERGY; MAGNETIC SUSCEPTIBILITY; SPIN ECHO; HUBBARD MODEL; GORKOV-ELIASHBERG THEORY; BILAYERS

Citation Formats

Dahm, T, Manske, D, and Tewordt, L. Quasiparticle and spin excitations for two coupled Hubbard planes and comparison with experiments on bilayer YBa{sub 2}Cu{sub 3}O{sub 6+{ital x}}. United States: N. p., 1996. Web. doi:10.1103/PhysRevB.54.6640.
Dahm, T, Manske, D, & Tewordt, L. Quasiparticle and spin excitations for two coupled Hubbard planes and comparison with experiments on bilayer YBa{sub 2}Cu{sub 3}O{sub 6+{ital x}}. United States. doi:10.1103/PhysRevB.54.6640.
Dahm, T, Manske, D, and Tewordt, L. Sun . "Quasiparticle and spin excitations for two coupled Hubbard planes and comparison with experiments on bilayer YBa{sub 2}Cu{sub 3}O{sub 6+{ital x}}". United States. doi:10.1103/PhysRevB.54.6640.
@article{osti_383259,
title = {Quasiparticle and spin excitations for two coupled Hubbard planes and comparison with experiments on bilayer YBa{sub 2}Cu{sub 3}O{sub 6+{ital x}}},
author = {Dahm, T and Manske, D and Tewordt, L},
abstractNote = {We use the fluctuation-exchange approximation on the real-frequency axis to calculate the quasiparticle self-energies and dynamic spin susceptibilities for the bonding and antibonding bands of two Hubbard planes coupled by interlayer hopping {ital t}{prime}. In the normal state we find that for increasing {ital t}{prime} ({approx_gt}0.3{ital t}) the interband spin susceptibility {chi}{sup {minus}} becomes much larger than the intraband susceptibility {chi}{sup +}. The {ital q{searrow}}, {omega}, and {ital T} dependence of Im{chi}{sup {minus}} agrees qualitatively with magnetic neutron scattering data on YBa{sub 2}Cu{sub 3}O{sub 6+{ital x}}. The ratio of the interlayer and intralayer spin-echo decay rates, {ital T}{sub 2}/{ital T}{sub 2}{sup {asterisk}}, becomes for {ital t}{prime}=0.3{ital t} roughly equal to the recent data of nuclear-quadrupole-resonance spin-echo double resonance. The splitting of the renormalized Fermi lines has about the same magnitude as the splitting observed by angle-resolved photoemission spectroscopy. The superconducting transition temperature for {ital d}{sub {ital x}{sup 2}{minus}{ital y}{sup 2}}-wave pairing decreases rapidly as {ital t}{prime} increases above {ital t}{prime}{approx_equal}0.3{ital t}. Our results for the reductions of intraplane magnetic correlations and pairing correlations by interlayer hopping are consistent with results of quantum Monte Carlo simulations. {copyright} {ital 1996 The American Physical Society.}},
doi = {10.1103/PhysRevB.54.6640},
journal = {Physical Review, B: Condensed Matter},
number = 9,
volume = 54,
place = {United States},
year = {1996},
month = {9}
}